In looking for a digital multimeter, I came across the Fluke 113 on eBay. I found out it has low input impedance (according to the specs, 3 k\(\Omega\)). What I don't understand is: why would one want such a device? Doesn't it make it pretty useless as a voltmeter if the input impedance is low? (I thought the whole point was to have I high resistance in the voltmeter so that current through the voltmeter was low)